Arrowhead Villas Mutual Service Company

Published drinking-water records and contacts for Arrowhead Villas Mutual Service Company. System CA3610093. Review sources and dates; not a real-time water assessment.

System ID: CA3610093
State or territory: CA
Published population served: 2654
System type (source code): CWS

Published records and dates

PFAS / lithium (EPA UCMR 5): 180 — 2024-03-12 – 2024-12-03
Lead and copper monitoring summaries: 13 — 1996-01-01 – 2024-12-31
California DDW laboratory results: 195 — 2026-01-06 – 2026-06-02

Missing records here do not mean the provider did not test. Published records are not a real-time assessment of your tap water.

Published testing results

Selected recent records are shown below. Different sampling locations and dates are not interchangeable. These excerpts are not a complete testing history.

“<” means below the stated reporting limit, not zero. A reported measurement alone is not a safety verdict. Read an example

EPA UCMR 5 — most recent imported sample per substance
Substance	Published result	Reporting limit	Sample date	Sampling location
11Cl-PF3OUdS	< 0.005 µg/L	0.005 µg/L	2024-12-03	Connection to CLAWA / 008
4:2 FTS	< 0.003 µg/L	0.003 µg/L	2024-12-03	Connection to CLAWA / 008
6:2 FTS	< 0.005 µg/L	0.005 µg/L	2024-12-03	Connection to CLAWA / 008
8:2 FTS	< 0.005 µg/L	0.005 µg/L	2024-12-03	Connection to CLAWA / 008
9Cl-PF3ONS	< 0.002 µg/L	0.002 µg/L	2024-12-03	Connection to CLAWA / 008
ADONA	< 0.003 µg/L	0.003 µg/L	2024-12-03	Connection to CLAWA / 008
HFPO-DA	< 0.005 µg/L	0.005 µg/L	2024-12-03	Connection to CLAWA / 008
NEtFOSAA	< 0.005 µg/L	0.005 µg/L	2024-12-03	Connection to CLAWA / 008
NFDHA	< 0.02 µg/L	0.02 µg/L	2024-12-03	Connection to CLAWA / 008
NMeFOSAA	< 0.006 µg/L	0.006 µg/L	2024-12-03	Connection to CLAWA / 008
PFBA	< 0.005 µg/L	0.005 µg/L	2024-12-03	Connection to CLAWA / 008
PFBS	< 0.003 µg/L	0.003 µg/L	2024-12-03	Connection to CLAWA / 008
PFDA	< 0.003 µg/L	0.003 µg/L	2024-12-03	Connection to CLAWA / 008
PFDoA	< 0.003 µg/L	0.003 µg/L	2024-12-03	Connection to CLAWA / 008
PFEESA	< 0.003 µg/L	0.003 µg/L	2024-12-03	Connection to CLAWA / 008
PFHpA	< 0.003 µg/L	0.003 µg/L	2024-12-03	Connection to CLAWA / 008
PFHpS	< 0.003 µg/L	0.003 µg/L	2024-12-03	Connection to CLAWA / 008
PFHxA	< 0.003 µg/L	0.003 µg/L	2024-12-03	Connection to CLAWA / 008
PFHxS	< 0.003 µg/L	0.003 µg/L	2024-12-03	Connection to CLAWA / 008
PFMBA	< 0.003 µg/L	0.003 µg/L	2024-12-03	Connection to CLAWA / 008
PFMPA	< 0.004 µg/L	0.004 µg/L	2024-12-03	Connection to CLAWA / 008
PFNA	< 0.004 µg/L	0.004 µg/L	2024-12-03	Connection to CLAWA / 008
PFOA	< 0.004 µg/L	0.004 µg/L	2024-12-03	Connection to CLAWA / 008
PFOS	< 0.004 µg/L	0.004 µg/L	2024-12-03	Connection to CLAWA / 008
PFPeA	< 0.003 µg/L	0.003 µg/L	2024-12-03	Connection to CLAWA / 008
PFPeS	< 0.004 µg/L	0.004 µg/L	2024-12-03	Connection to CLAWA / 008
PFTA	< 0.008 µg/L	0.008 µg/L	2024-12-03	Connection to CLAWA / 008
PFTrDA	< 0.007 µg/L	0.007 µg/L	2024-12-03	Connection to CLAWA / 008
PFUnA	< 0.002 µg/L	0.002 µg/L	2024-12-03	Connection to CLAWA / 008
lithium	< 9 µg/L	9 µg/L	2024-12-03	Connection to CLAWA / 008

Download all EPA UCMR 5 records (CSV)

Lead and copper: 90th-percentile summaries

These describe a monitoring period across sampled locations, not the result at your home. How to read the 90th percentile

Eight most recent imported monitoring summaries
Substance	Published 90th percentile	Monitoring period	Source quarter
Lead (PB90)	0.01 mg/L	2022-01-01 – 2024-12-31	2026Q3
Lead (PB90)	0.0046 mg/L	2019-01-01 – 2021-12-31	2026Q3
Lead (PB90)	0.009 mg/L	2016-01-01 – 2018-12-31	2026Q3
Lead (PB90)	0.0065 mg/L	2013-01-01 – 2015-12-31	2026Q3
Lead (PB90)	0.005 mg/L	2009-01-01 – 2011-12-31	2026Q3
Lead (PB90)	0 mg/L	2006-01-01 – 2008-12-31	2026Q3
Lead (PB90)	0.0053 mg/L	2002-01-01 – 2004-12-31	2026Q3
Lead (PB90)	0 mg/L	2000-01-01 – 2002-12-31	2026Q3

Twelve most recent imported state laboratory records
Substance	Published result	Sample date	Location / source
COMBINED URANIUM	14 PCI/L	2026-06-02	BIG WELL (WELL 03) / California DDW laboratory results
COMBINED URANIUM	< 1.000000000 PCI/L	2026-06-02	WELL 3 IX COMBINED EFFLUENT / California DDW laboratory results
COMBINED URANIUM	14 PCI/L	2026-05-19	BIG WELL (WELL 03) / California DDW laboratory results
COMBINED URANIUM	< 1.000000000 PCI/L	2026-05-19	WELL 3 IX COMBINED EFFLUENT / California DDW laboratory results
BORON, TOTAL	< 100.000000000 UG/L	2026-04-28	WELL 05 (OAKMONT) / California DDW laboratory results
SELENIUM	< 5.000000000 UG/L	2026-04-28	WELL 05 (OAKMONT) / California DDW laboratory results
ODOR	1 TON	2026-04-28	BIG WELL (WELL 03) / California DDW laboratory results
ALKALINITY, CARBONATE	< 5.000000000 MG/L	2026-04-28	WELL 05 (OAKMONT) / California DDW laboratory results
ALUMINUM	< 50.000000000 UG/L	2026-04-28	BIG WELL (WELL 03) / California DDW laboratory results
CHLORIDE	14 MG/L	2026-04-28	BIG WELL (WELL 03) / California DDW laboratory results
ALKALINITY, BICARBONATE	120 MG/L	2026-04-28	BIG WELL (WELL 03) / California DDW laboratory results
PERCHLORATE	< 1.000000000 UG/L	2026-04-28	WELL 05 (OAKMONT) / California DDW laboratory results

State sampling points can include untreated water. Publisher qualifiers and units are retained; consult the full source notes before interpreting a record.

Download state records with source notes (CSV)

Published compliance history

0 imported records. Status is as recorded in the source; historical records are not current advisories. Missing records do not establish that no violations occurred.

Source dates and refresh checks

A refresh check is not a sample date. Publication periods, sample dates and checks are shown separately.

EPA SDWIS lead/copper summaries and service areas — source period: — – —; last checked: 2026-10-17
EPA SDWIS contacts and compliance records — source period: — – —; last checked: 2026-10-17
EPA UCMR 5 sample results — source period: 2023-01-03 – 2026-06-17; last checked: 2026-10-17
California DDW laboratory results — last successful check: 2026-10-17

Administrative contact (EPA filing)

Carrillo, Michael: 909-337-4259

An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.

Official state resources · How to read these records